Leather-press.



No. 7l2,865. Patented Nov. 4,1902.

J. THOMSON.

LEATHER PRESS.

(Application filed June 19, 1901.)

Qllo Nodal.)

No. 7|2,865. Patented Nov. 4,. I902.

J. THOMSON.

LEATHER PRESS.

(Application filed June 19, 1901.) (No Model.) 2 She 'tSSheet 2.

EEEEE. EKEEIEJK UNITED STATES PATENT OFFICE.

JULIUS THOMSON, OF OFFENBACH-ON-THE-MAIN, GERMANY.

LEATHER-PRESS.

SPECIFICATION forming part of Letters Patent No. 712,855, dated November 4, 1902- Application filed June 19, 1901. Serial No. 65,197. (No model.)

To all whom, it may concern.-

Be it known that I, JULIUS THOMSON, a subject of the Emperor of Germany, and a resident of OIfenbach-on-the-Main, Germany, have invented certain new and useful Improvements in Leather-Presses and the Like, of which the following is a specification.

In the leather trade presses have hitherto been used for forming various impressions of grained, shagreen, crocodile, lizard skins, and the like, as well as for patterns, in which presses these patterns are engraved on a plate or roller and suitably impressed into the hide, and as it is in practice dilficult and too e25- pensive to make plates or rollers which will extend simultaneously over the whole surface or, rather, width of the hide to be impressed they are made only in sizes which may be described as small in comparison with the superficial area of the hide. In order to press the whole hide with such rollers or the like, it is necessary that the rollers shall be capable of being rapidly separated from one another, with. the objeot of feeding the leather with napidity and certainty, and more particularly, however, for the purpose of protecting the pressing-roller and for other rea-' sons known to practical men.

This invention therefore has for its object a machine in which a suitable high pressure which is capable of adjustment may be exerted,and yet by m eansof an ordinary easily-operated foot-lever the pressing-rollers employed in the present instance may be moved sulficientlyfarapart. Further-,withthisimproved machine the following advantage is also attained: In the old machines in consequence of the arrangement of the pressing-rollers between two standards it was necessary to place these two standards so far apart that even large hides could pass between them. Thereby, therefore, it was necessary for the machine to be not only very large and heavy, but also comparatively expensive. This objection is obviated in the present improved machine by its being constructed in such a way that the rollers which produce the pattern no longer lie between the large standards; but they are arranged on separate bearing-bars in such a way that they are free to move in all direct-ions at the points of contact and that any, even the largest, hide (fell) can be passed through either longitudinally or transversely.

One example of construction of this improved machine is shown in the-accompanying drawings, in which- Figure 1 is a side view, Fig. 2 an end view, and Figs. 3 and 4 detail views.

Referring to the drawings, a represents two main standards rising'from a base-plate, between the upper ends-of which is mounted a rocking cross-bar c, from which is suspended by means of a pair of toggle-links i i a revoluble pattern-roller h, which by the system of levers hereinafter described is adapted to be raised and lowered with reference to a fixed rotary pressure-roller d,'s0 as to act on the material fed between them to receive the pattern. The pattern-roller is suspended between the lower ends of the toggle-links i by spindles on the roller, which are extended loosely through bearing-openings in thelinks, and at the outer sides of the links the spindles are encircled by the forward ends of bars v, whose rear ends are mounted loosely on a horizontal rock-shaftn, mounted in bearings in the standards a. These rodso act as guides and braces for the pattern-roller, guiding it in its vertical movements to and from the pressure-roller in the arc of a, circle described from the shaft 11 as a center.

Connected with the toggle-links 'i 2'- where they are jointed together is a second pair of toggles Z, the forward ends of which loosely encircle a cross-bar P at the junction of the links i, while their rear ends are fixed t0 the shaft n, the construction being such that by the rocking of the shaft the toggle Z will be straightened out, as shown in Fig. 3, or contracted, as shown in Fig. 4,-which actions will respectively straighten out the toggles i and depress the pattern-roller h and contract the togglesql and raise the roller h. The rocking of shaft 01, to thus act on the toggles to raise and lower the patternroller is effected by the foot-lever q, pivoted at its rear end to the base of the frame and jointed between its ends to the lower. end of a vertical link 0, which link has its upper end jointed to the forward end of an arm projecting from the shaft n. The foot-lever is held normally in an elevated position, as shown in Fig. 4, by means of a Weighted arm r, fixed to and projecting rearwardly from the shaft 11, in which position of the parts both of the toggle-levers will be contracted and the pattern-roller elevated. On the depression of the foot-lever to the position shown in Fig. 3 the toggles Z will be straightened out, and acting on the toggles 1; the latter will be straightened and the pattern roller will be lowered onto the pressureroller. The pattern roller is driven through its frictional contact with the material passing between it and the pressureroller, the latter being driven positively through the medium of a pinion e, fixed to it and meshing with a gear-wheelf, fixed to the hub of a pulley m. From this pnlleym a driving-band passes around guide-pulleys y and over a band-wheel fixed to the hub of a main driving-pulley g, which latter receives its motion from any suitable source.

In the operation of the machine rotary motion is imparted to the pressure-roller d and the pattern-roller is elevated, as shown in Fig. 4, so as to leave a space between them for the introduction of the material to be acted on. This material is fed from a table tand presented over the pressure-roller and beneath the pattern-roller, and the latter is depressed into frictional contact with the material, which will force the same in'contact with the rotary pressure-roller, which action will cause the material to be advanced between the rollers, and the pattern-roller will impart to it its surface pattern. On the release of the foot-lever the weighted arm will raise the same and through the medium of the system of toggles will elevate the roller h and separate the same from the pressureroller.

I declare that what I claim is 1. In a leather-press the combination with the frame, of a rotary pressure-roller mounted therein, two sets of parallel toggle-links '1; jointed at one end with the frame, a patternroller-journaled between the opposite ends of the links, a second set of toggle-links Z jointed at one end at the junction of links 2', a horizontal operating-shaftn mounted in the frame and having rigidly connected with it the opposite ends of the links Z, an arm fixed to shaft 12, a foot-lever q, and a link jointed respectively to the arm and foot-lever.

2. In a leather-press the combination with the frame, ofa rotarypressure-roller mounted therein, two sets of parallel toggle-links 7; jointed at their upper ends with the frame and extending downwardly toward the pressure-roller,a pattern-roller jonrnaled between the lower ends of the links, a second set of toggle-links l jointed at their forward ends at the junction of the links 11, a horizontal rock-shaft n having the rear ends of linkslrigidly connected therewith, a counterweighted arm 1" projecting rearwardly from the rockshaft and tending to contract links land 2; and thereby elevate the pattern-roller, a footlever, and connections between the foot-lever and shaft arranged so that the depression of the former will rock the shaft against the influence of the weighted armand extend the toggle-links and depress the pattern-roller.

3. In a leather-press the combination with the frame, of a pressure-roller mounted therein, two standards rising from the frame, a rocking cross-bar c mounted between the upperends of said standards, toggle-linkst' connected at their upper ends with the rocking cross-bar and extending downwardly toward the pressure-roller, a pattern-roller journaled between the lower ends of links 'i,toggle-links Z, connected at one end with the links i, a rock-shaft n to which the opposite ends of links Zare rigidly connected, 3 foot-lever, and connections between the foot-lever and rockshaft.

4. In a leather-press the combination with a frame, of a rotary pressure-roller journaled therein, two sets of toggle-links arranged parallel with each other and connected at their upper ends with the frame, a pattern-roller jonrnaled between the lower ends of said links with its axis parallel with the axes of the links, means for actuating the links to move the pattern-roller to and from the pressure-roller, and a guide-rod 'v jointed at one end to the frame and connected at its opposite ends with the axis of the pattern-roller.

5. In a leather-press the combination with the frame, of a rotary pressure-roller mounted therein, toggle-links connected at one end with the frame, a pattern-roller journaled in the opposite ends of the links, a horizontal rock-shaft, toggle-links Zfixed at one of their ends to said shaft and connected at their opposite ends at the junction of the toggles 'i, and means for rocking the shaft.

In witness whereof I have hereunto signed my name, this 16th day of February, 1901, in

the presence of two subscribing witnesses. JULIUS THOMSON.

Witnesses:

JEAN GRUND, CARL GRUND. 

